Rust

add create external table tests #143

Job	Run time
Check cargo fmt	39s
cargo check	7m 16s
build with wasm-pack	2m 36s
cargo test (macos)	11m 22s
cargo test (macos-aarch64)	11m 44s
Verify MSRV (Min Supported Rust Version)	7m 16s
Verify Vendored Code	55s
cargo test (win64)	43m 33s
cargo test datafusion-cli (amd64)	3m 53s
cargo test (amd64)	10m 3s
clippy	6m 0s
cargo test hash collisions (amd64)	13m 51s
cargo test doc (amd64)	14m 31s
cargo doc	3m 58s
cargo examples (amd64)	13m 4s
Run sqllogictest with Postgres runner	3m 26s
cargo test pyarrow (amd64)	3m 1s
verify benchmark results (amd64)	12m 17s
check Cargo.toml formatting	2m 56s
check configs.md is up-to-date	2m 47s
	2h 55m 8s

Provide feedback